1、创建springboot项目或maven项目。
2、创建tbluser表
DROP TABLE IF
EXISTS tbluser;
CREATE TABLE
tbluser (
user_id int(11) NOT NULL AUTO_INCREMENT,
user_name varchar(20) DEFAULT NULL
COMMENT ‘用户名’,
pass_word varchar(20) DEFAULT NULL
COMMENT ‘密码’,
create_date datetime DEFAULT NULL,
address varchar(100) DEFAULT NULL,
PRIMARY KEY (user_id)
) ENGINE=InnoDB
AUTO_INCREMENT=1 DEFAULT CHARSET=utf8;
3、创建User类
public class User {
private Integer userId;
private String userName;
private String passWord;
private Date createDate;
private String address;
省略getter(),setter()方法
｝
4、在pom.xml文件中添加依赖
<?xml version="1.0" encoding="UTF-8"?>
4.0.0
org.springframework.boot
spring-boot-starter-parent
2.1.4.RELEASE
com.hp
springBoot_010
0.0.1-SNAPSHOT
springBoot_mybatisplus
hello world springBoot
<!-- jdk版本 -->
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<!--
springBoot启动器 -->
org.springframework.boot
spring-boot-starter-web
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<!-- thymeleaf启动器 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
<!--
mybatisPlus启动器 -->
com.baomidou
mybatis-plus-boot-starter
2.3
<!-- mysql数据库驱动 -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.45</version><!--$NO-MVN-MAN-VER$-->
</dependency>
<!-- druid数据库连接池 -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.1.0</version>
</dependency>
<!-- fastjson
–>
com.alibaba
fastjson
1.2.23
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
5、创建application.yml配置文件，放在src/main/resources下
spring:
datasource:
driver-class-name: com.mysql.jdbc.Driver
url: jdbc:mysql://localhost:3306/mybatis
username: root
password: root
type: com.alibaba.druid.pool.DruidDataSource
mybatis-plus:
type-aliases-package: com.hp.pojo
configuration:
map-underscore-to-camel-case: true
6、创建UserMapper接口，并继承BaseMapper接口
package com.hp.mapper;
import java.util.List;
import com.baomidou.mybatisplus.mapper.BaseMapper;
import com.hp.pojo.User;
public interface UserMapper extends BaseMapper{
/**
* 查询所有用户信息
*/
public List<User> selectUsers();
/**
* 新增用户用户信息
*/
public void insertUser(User user);
}
7、创建IUserService接口
package com.hp.service;
import java.util.List;
import com.hp.pojo.User;
public interface IUserService {
/**
* 查询所有用户信息
*/
public
List selectUsers();
/**
* 新增用户用户信息
*/
public
void insertUser(User user);
/**
* 根据userId查询用户信息
*/
public
User selectUserByUserId(Integer userId);
}
8、创建IUserService接口实现类UserService
package com.hp.service.impl;
import java.util.List;
import javax.annotation.Resource;
import
org.springframework.stereotype.Service;
import
org.springframework.transaction.annotation.Propagation;
import
org.springframework.transaction.annotation.Transactional;
import
com.baomidou.mybatisplus.mapper.EntityWrapper;
import com.hp.mapper.UserMapper;
import com.hp.pojo.User;
import com.hp.service.IUserService;
@Service
@Transactional(propagation=Propagation.REQUIRED)
public class UserService implements
IUserService{
@Resource
private
UserMapper userMapper;
/**
* 查询所有用户信息
*/
@Transactional(readOnly=true)
public
List selectUsers(){
return userMapper.selectList(new
EntityWrapper<>());
}
/**
* 新增用户用户信息
*/
public
void insertUser(User user) {
userMapper.insert(user);
}
/**
* 根据userId查询用户信息
*/
@Transactional(readOnly=true)
public
User selectUserByUserId(Integer userId) {
return userMapper.selectById(userId);
}
}
9、创建UserController类
package com.hp.controller;
import java.util.List;
import javax.annotation.Resource;
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import
org.springframework.web.bind.annotation.RequestMapping;
import com.hp.pojo.User;
import com.hp.service.IUserService;
@Controller
@RequestMapping("/user")
public class UserController {
@Resource
private IUserService userService;
@RequestMapping("userInfo")
public String hello(ModelMap map) {
List<User> userList = userService.selectUsers();
map.put("userList", userList);
return
“user/userInfo”;
}
/**
* 进入新增的页面
*/
@RequestMapping(value="userEdit")
public String userEdit(Integer userId,ModelMap map) {
if(userId!=null) {
//根据userId查询用户信息
User user = userService.selectUserByUserId(userId);
map.put("user", user);
map.put("userId", userId);
}else {
map.put("user", new User());
}
return
“user/userEdit”;
}
/**
* 保存用户信息
*/
@RequestMapping(value="addUser")
public String insertUser(User user,Integer userId) {
userService.insertUser(user);
return
“redirect:userInfo”;
}
}
10、创建启动器类App,注意，它所在的包必须是其它包的父包
package com.hp;
import java.text.SimpleDateFormat;
import java.util.Date;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;
import
org.springframework.core.convert.converter.Converter;
@SpringBootApplication
@MapperScan(value=
{“com.hp.mapper”})
public class App {
public static void
main(String[] args) {
SpringApplication.run(App.class, args);
}
/**
* 用于处理前台日期传到后台格式
* @return
*/
@Bean
public Converter<String, Date> dateFormatConvert() {
return new Converter<String, Date>() {
@Override
public Date convert(String source)
{
SimpleDateFormat sdf = new SimpleDateFormat(“yyyy-MM-dd”);
Date date = null;
try {
date = sdf.parse((String) source);
} catch (Exception e) {
e.printStackTrace();
}
return date;
}
};
}
}
11、在src/main/resources/templates下创建user文件夹，并创建userInfo.html文件
| 用户编号 | 用户姓名 | 用户密码 | 创建日期 | 用户地址 |
12、在src/main/resources/templates下创建user文件夹，并创建userEdit.html文件
用户密码：
用户地址：
创建日期：
13、在浏览器中输入访问的地址，如下图所示
14、最后项目目录如下图所示
转载：https://blog.csdn.net/weixin_45471568/article/details/101558541